I am looking for input on motor for a VectorFlight 58in 300S (60-75 size) model. I trained on a Super Tigre .61 in a Hobbico .60 and progressed to a Sig Four Star 60 with a Super Tigre.75 in it. I'd like some input as to best motor for the plane. I have had considerable experience with Super Tigres both in the RC models and in control line aerobatics, so a warm place in my heart. Never have had a problem with one. But What are your experiences. Is an OS going to give me something the Supre Tigre does not? I am not really interested in four strokes so stick to 2 stroke recs. Also is a .75 the best size for this model. I see so many posts of people uping the size of recommended power plants and obviously there is no weight penalty to speak of in the ST .61 to .90. In that VectorFlight has a 66 inch model for .90 power it leads me to believe they feel pretty strongly that a .75 is the right power. What are your thoughts?


Thanks,

bob branch

As with most questions of this type there are many choices that will work. The overall weight of the plane with all items installed will have an effect. Since the Super Tigre and OS both use the same case for the 60 and the 90 size engines weight will be all but the same. The Tigers are on sale currently at Tower so if the budget gets invovled it may be a little less. The OS may produce a little more power since the design is a newer one (ST is a ringed engine and the OS is ABC type).

The 90 will give you better vertical and better down line braking (from the larger prop disc) so that would be my choice. As far as brand it's like arguing Ford vs Chevy. Go with what you are comfortable with. Good luck!

EXCAP232

Bob

Do a search on Vectorflight and you will find a ton of information here on RCU. There are some people who have used the ST 90 on the extra and edge. Read the threads and you will find a lot of useful information about vectorfligths planes. I had the 66 inch extra with a 91 4 stroke on it and it was great. I recently lost it due to the rx battery dying in flight. I will get another one soon. I like the ST 75 and if I already had one I would use it. If I had to buy another engine I would get the 90 instead just because it can be used on a larger variety of planes in the future. ST engines are great and I have 7 of them in lots of different sizes.

Rick

I would recommend the ST90.
Thse engines are great and they are a good value